*DECK INSCDR
USETEXT NIPDEF
USETEXT ACNB
USETEXT ACB 
USETEXT AT
 PROC INSCDR((ACNBFWA));               # ADD ACNB TO CDR               #
 STARTIMS ; 
 #
*1DC  INSALR
*     1. PROC NAME           AUTHOR              DATE 
*        INSCDR              E. GEE              85/04/02 
* 
*     2. FUNCTIONAL DESCRIPTION 
*        INSERT ACNB INTO THE CONNECTION DATA RING, IF ONE EXISTS.
*        IF NONE EXIST, CREATE ONE WITH THIS ACNB.
* 
*     3. METHOD 
*        IF NO CONNECTION DATA RING EXISTS, 
*          UPDATE ACB TO POINT TO THIS ACNB.
*        ELSE (CONNECTION DATA RING ALREADY EXISTS),
*          ADD THIS ACNB TO CONNECTION DATA RING.  IT IS LINKED IN
*            FRONT OF THE ACNB POINTED TO BY THE ACB. 
* 
*     4. ENTRY PARAMETERS 
*        ACNBFWA   - FIRST WORD ADDRESS OF THIS ACNB. 
* 
*     5. EXIT PARAMETERS
*        NONE 
* 
*     6. COMDECKS CALLED
*        ACNB 
*        ACB
*        AT 
*        NIPDEF 
* 
*     7. ROUTINES CALLED
*        XTRACE - TRACE PROCEDURE CALL
* 
*     8. DAYFILE MESSAGES AND OTHER IMPORTANT INFORMATION 
* 
 #
STOPIMS;
  
# 
      EXTERNAL REFERENCES 
# 
      XREF
        BEGIN 
        PROC XTRACE;
        END 
# 
      FORMAL PARAMETERS 
# 
      ITEM ACNBFWA    U;               # FWA OF ACNB TO BE ADDED TO CDR#
# 
      LOCAL VARIABLES 
# 
      ITEM CDRBP;                      # CDR BACK POINTER              #
      CONTROL EJECT;
  
      BEGIN                            # BEGIN INSCDR                  #
  
      CONTROL IFEQ DEBUG,1; 
      XTRACE("INCDR");
      CONTROL FI; 
  
      P<ACNB> = ACNBFWA;
      P<ACB> = ATACBA[ACNBAN[0]];      # FWA OF ACB                    #
      IF ACBCDRP[0] NQ 0
      THEN                             # CONNECTION DATA RING EXISTS   #
        BEGIN 
        P<ACNB> = ACBCDRP[0];          # FWA OF ACNB                   #
        CDRBP = ACNBCDRBP[0];          # ADDR OF PREV ACNB IN CDR      #
        ACNBCDRBP[0] = ACNBFWA;        # ADDR OF NEW LAST ACNB IN CDR  #
        P<ACNB> = ACNBFWA;
        ACNBCDRBP[0] = CDRBP;          # ADDR OF NEXT TO LAST ACNB     #
        ACNBCDRFP[0] = ACBCDRP[0];     # ADDR OF FIRST ACNB IN CDR     #
        P<ACNB> = CDRBP;               # NEXT TO LAST ACNB IN CDR      #
        ACNBCDRFP[0] = ACNBFWA;        # ADDR OF NEW LAST ACNB IN CDR  #
        END 
      ELSE                             # NO CONNECTION DATA RING EXISTS#
        BEGIN 
        ACNBCDRFP[0] = ACNBFWA; 
        ACNBCDRBP[0] = ACNBFWA; 
        ACBCDRP[0] = ACNBFWA; 
        END 
  
      RETURN; 
  
      END                              # END INSCDR                    #
      TERM